Laser driven pyrolysis of n-alkanes

1985 ◽  
Vol 50 (1) ◽  
pp. 223-227 ◽  
Author(s):  
Josef Pola ◽  
Václav Chvalovský
Keyword(s):  
Surface Reactions ◽  
No Production ◽  
Laser Process ◽  
Tubular Reactors ◽  
Conventional Pyrolysis ◽  
Small Alteration

CW CO2 laser photosensitized (SF6) homogeneous pyrolysis of n-alkanes (C5-C7) affords almost twice higher yield of important ethylene compared to conventional pyrolysis in tubular reactors. No production of heavy pyrolytic oils, resins or coke and very small alteration of the pyrolytic distribution with the conversion are other advantages of the laser process that can be ascribed to the absence of in conventional reactors important surface reactions.

Clinical aspects of reactive oxygen and nitrogen species

2004 ◽  
Vol 71 ◽  
pp. 121-133 ◽  
Author(s):  
Ascan Warnholtz ◽  
Maria Wendt ◽  
Michael August ◽  
Thomas Münzel
Keyword(s):  
Oxidative Stress ◽  
Reactive Oxygen Species ◽  
Risk Factor ◽  
Endothelial Dysfunction ◽  
Vascular Tissue ◽  
Rapid Development ◽  
Reactive Oxygen ◽  
Clinical Aspects ◽  
No Production ◽  
Oxygen Species

Endothelial dysfunction in the setting of cardiovascular risk factors, such as hypercholesterolaemia, hypertension, diabetes mellitus and chronic smoking, as well as in the setting of heart failure, has been shown to be at least partly dependent on the production of reactive oxygen species in endothelial and/or smooth muscle cells and the adventitia, and the subsequent decrease in vascular bioavailability of NO. Superoxide-producing enzymes involved in increased oxidative stress within vascular tissue include NAD(P)H-oxidase, xanthine oxidase and endothelial nitric oxide synthase in an uncoupled state. Recent studies indicate that endothelial dysfunction of peripheral and coronary resistance and conductance vessels represents a strong and independent risk factor for future cardiovascular events. Ways to reduce endothelial dysfunction include risk-factor modification and treatment with substances that have been shown to reduce oxidative stress and, simultaneously, to stimulate endothelial NO production, such as inhibitors of angiotensin-converting enzyme or the statins. In contrast, in conditions where increased production of reactive oxygen species, such as superoxide, in vascular tissue is established, treatment with NO, e.g. via administration of nitroglycerin, results in a rapid development of endothelial dysfunction, which may worsen the prognosis in patients with established coronary artery disease.

459 Myocardial NOS1-derived NO production regulates basal and b-adrenergic cardial contractility in rat heart failure

2003 ◽  
Vol 2 (1) ◽  
pp. 93-94
Author(s):  
J BENDALL ◽  
P RATAJCZAK ◽  
T DAMY ◽  
E ROBIDEL ◽  
F MAROTTE ◽  
...  
Keyword(s):  
Heart Failure ◽  
Rat Heart ◽  
No Production

Light and oxygen stress in Spirulina platensis (cyanobacteria) grown outdoors in tubular reactors

1996 ◽  
Vol 97 (1) ◽  
pp. 175-179 ◽  
Author(s):  
Avigad Vonshak ◽  
Giuseppe Torzillo ◽  
Paola Accolla ◽  
Luisa Tomaselli
Keyword(s):  
Spirulina Platensis ◽  
Oxygen Stress ◽  
Tubular Reactors

Polyphenols from Cymbopogon citratus inhibit iNOS expression and NO production – a promising source of new anti-inflammatory drugs

Planta Medica ◽  
2010 ◽  
Vol 76 (12) ◽  
Author(s):  
V Francisco ◽  
A Figueirinha ◽  
B Neves ◽  
C Garcia-Rodriguez ◽  
M Lopes ◽  
...  
Keyword(s):  
Inos Expression ◽  
No Production ◽  
Cymbopogon Citratus ◽  
Inflammatory Drugs ◽  
Anti Inflammatory ◽  
Promising Source

Inhibitory effect of isolated constituents from sclerotia of Poria cocos on LPS-induced NO production

Planta Medica ◽  
2016 ◽  
Vol 81 (S 01) ◽  
pp. S1-S381
Author(s):  
SR Lee ◽  
S Lee ◽  
HJ Eom ◽  
HR Kang ◽  
JS Yu ◽  
...  
Keyword(s):  
Inhibitory Effect ◽  
No Production ◽  
Poria Cocos

Continuous laser process of welding and heat treatment for stress improvement joining

2008 ◽  
Author(s):  
Ryoichi Kuwano ◽  
Yoshiki Nagano ◽  
Tsuyoshi Tokunaga ◽  
Toshiyuki Miyazaki
Keyword(s):  
Heat Treatment ◽  
Continuous Laser ◽  
Laser Process
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